You searched for: “solstice
solstice (s) (noun), solstices (pl)
1. Either of the times when the sun is farthest from the equator, on or about June 21 or December 21: The summer solstice falls between May and July in the northern hemisphere, and in the southern hemisphere in December, and vice versa for the winter solstice.

The summer solstice is the longest day of the year and the winter solstice is the shortest.
2. Either of the two points on the ecliptic when the sun reaches its northernmost or southernmost point relative to the celestial equator: When the solstice is at its position closest to the North Pole, the sun might shine the whole day if there aren't any clouds in the sky!

Word Entries at Get Words: “solstice
solstice
1. The moment when the sun is at its northernmost or southernmost point in the sky then it is the first day of summer or winter.

The summer solstice, when the sun is farthest north, occurs around June 21; the winter solstice takes place around December 21.

2. The point at which the sun reaches its greatest positive and negative declinations.

The referenced dates, summer solstices and winter solstices, are considered the longest and shortest days of the year, respectively.

This entry is located in the following unit: Astronomy and related astronomical terms (page 24)